Production of pure magnesium chloride solution from...

Details Production of pure magnesium chloride solution from... Production of pure magnesium chloride solution from...

C - Chemistry, Metallurgy

01

F

23/175

C01F 5/30 (2006.01) C22B 3/00 (2006.01) C22B 26/22 (2006.01)

Patent

CA 1303327

Abstract of the Disclosure: A process for the production of pure magnesium chloride liq- uor from siliceous magnesium minerals comprises the steps of leaching the siliceous magnesium mineral with a hydrochloric acid solution at a temperature higher than 50°C but below the boiling point and in such a manner as to maintain the pH of the slurry below 1.5 to prevent the formation of silica gel, reacting such slurry with a reactive magnesia in order to raise the pH to 4.0-7.0 to precipitate substantially all the impurities from solution while preventing silica gel forma- tion, and performing a solid/liquid separation of the slurry on suitable filtration equipment to obtain pure magnesium chloride liquor.

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